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Cranking but no start

Tiny
ALAIN LEBRASSE
  • MEMBER
  • 2002 VOLKSWAGEN PASSAT
  • 1.9L
  • 4 CYL
  • 2WD
  • MANUAL
  • 147,500 MILES
Hi, I am new here and my car is cranking but not starting. Check wiring to crankshaft sensor and getting 2.5 volts on all three pins what should I do?
Friday, April 12th, 2019 AT 12:15 PM

6 Replies

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

This sounds to me like your vehicle's Crankshaft Position Sensor (CKP) sensor has a short in it. The middle wire on the connector is the ground wire and should have no voltage to it at all. In the diagrams down below I have included a factory diagnostic test for the CKP sensor. I have also included a few links for you to go to below as well:

https://www.2carpros.com/articles/how-a-crank-shaft-angle-sensor-works
https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor
https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

Please go through these guides and the information in the diagrams down below and get back to us with what you are able to find out, please.

Thanks,
Alex
2CarPros
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Friday, April 12th, 2019 AT 12:57 PM
Tiny
ALAIN LEBRASSE
  • MEMBER
  • 5 POSTS
Well, you are right. I do have a short in my sensor itself.
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Sunday, April 14th, 2019 AT 11:52 AM
Tiny
ALAIN LEBRASSE
  • MEMBER
  • 5 POSTS
Hi alex got a new crankshaft sensor and still no start can it be a faulty camshaft sensor and how can I test the camshaft sensor?
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Monday, April 15th, 2019 AT 8:24 AM
Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello again,

I have included the information that you requested in the diagrams down below. There are a couple of other tests that I did not include because they require the use of a dual lab scope. I have also included a link below for you to go to below.

https://www.2carpros.com/articles/camshaft-angle-sensor-replacement

Please go through these guides and get back to us with what you are able to find out, please.

Thanks,
Alex
2CarPros
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Monday, April 15th, 2019 AT 1:30 PM
Tiny
ALAIN LEBRASSE
  • MEMBER
  • 5 POSTS
Hi, already change camshaft sensor and glow plug light still flashing on dash. Cranking but no start. I am feeling tired but don't want to lose the car, but not knowing what to do. Tomorrow a friend of mine will get the scan tool to check for faults.
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Tuesday, April 16th, 2019 AT 8:35 AM
Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello again,

Okay, there seems to be some kind of communication issue going on between us, and I apologize for that. I understand how frustrated you are and we will get your vehicle running again, so no worries. Let's get back to the basics, and start there. Okay, an engines needs three things to start and run, fuel, spark (delivered a the proper time), and compression. So let's start with spark. I have included a link for you to go to down below:

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Please go through this guide and get back to us with what you are able to find out, please.

Thanks,
Alex
2CarPros
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Tuesday, April 16th, 2019 AT 11:13 AM

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